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Ocean dredging sludge composite solidified material

A technology for solidifying materials and dredging silt, which is applied in the field of marine dredging and silt composite solidifying materials, can solve problems such as damage to mountain vegetation and great environmental impact, and achieve the effects of reducing riverbed, protecting ecological environment and enhancing strength.

Inactive Publication Date: 2013-06-05
JIANGSU NATURE WAY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In the process of mining stone materials, it will cause irreversible damage to the mountain and its vegetation, which has a great impact on the environment

Method used

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  • Ocean dredging sludge composite solidified material

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Effect test

specific Embodiment 1

[0044] The composition (mass percentage) of a composite solidified material for marine dredging silt is: 50% of tailings waste, 15% of mineral powder, 16% of lime, 7% of cement, 4% of steel slag powder, 5% of fly ash, salt Activator 3%. The tailings waste is phosphorous tailings sand; the fly ash is grade C, and the CaO content is not less than 10%; the digestion temperature of calcium oxide is not lower than 60°C, and the digestion time is medium speed; the fineness of steel slag powder is 400m 2 / kg, Fe 2 o 3 The content is not less than 15%; the cement grade is not less than #325 and early-strength cement is not allowed.

[0045] Configure the marine dredging silt composite solidified material according to the ratio. In each cubic meter of silt, the moisture content of the silt is 100%, mix 120kg of solidified material, and then stir evenly.

[0046] After the sludge is solidified, the unconfined compressive strength reaches 182kpa at 7d, 218kpa at 14d, and 291kpa at 28...

specific Embodiment 2

[0047]A kind of marine dredging mud composite solidification material, its components (mass percentage) are: tailings waste 45%, mineral powder 15%, lime 18%, cement 8%, fly ash 5%, steel slag powder 8%, salt Activator 1%. Among them, the tailing waste is iron ore tailing sand; the fly ash is grade C, and the CaO content is not less than 10%; the digestion temperature of calcium oxide is not lower than 60°C, and the digestion time is medium speed; the fineness of steel slag powder is 400m 2 / kg, Fe 2 o 3 The content is not less than 15%; the cement grade is not less than #325 and early-strength cement is not allowed. Configure the marine dredging silt composite solidified material according to the ratio. In every cubic meter of silt, the moisture content of the silt is 120%, and 120kg of solidified material is mixed (stirred evenly).

[0048] After the sludge is solidified, the unconfined compressive strength reaches 121kpa at 7d, 145kpa at 14d, and 203kpa at 28d. At the ...

specific Embodiment 3

[0049] A marine dredging mud composite solidification material whose components (mass percentage) are: 45% of tailings waste, 15% of mineral powder, 20% of lime, 8% of cement, 5% of fly ash, 6% of steel slag powder, salt Activator 1%. Among them, the tailings waste is chrome ore tailings sand; the fly ash is grade C, and the CaO content is not less than 10%; the digestion temperature of calcium oxide is not lower than 60°C, and the digestion time is medium speed; the fineness of steel slag powder is 400m 2 / kg, Fe 2 o 3 The content is not less than 15%; the cement grade is not less than #325 and early-strength cement is not allowed.

[0050] Configure the marine dredging silt composite solidified material according to the ratio. In every cubic meter of silt, the moisture content of the silt is 120%, and 120kg of solidified material is mixed (stirred evenly).

[0051] After the sludge is solidified, the unconfined compressive strength reaches 140kpa at 7d, 185kpa ​​at 14d, ...

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Abstract

The invention discloses an ocean dredging sludge composite solidified material which comprises the following components in percentage by mass: 45-63% of tailing waste, 8-15% of ore powder, 13-25% of lime, 6-16% of cement, 4-8% of steel slag powder, 5-10% of fly ash and 0.5-3% of salt excitant. According to the invention, pollution waste materials such as tailing wastes, dredging sludge and the like are changed into valuable substances through chemical solidification, so that an earthwork material for harbor engineering construction can be obtained while environmental pollution is solved, thereby improving the construction efficiency and lowering the construction cost.

Description

Technical field: [0001] The invention belongs to the field of port engineering construction, in particular to a composite solidified material for ocean dredging silt. Background technique: [0002] Fine-grained tailings waste belongs to the accumulation after mineral processing, is the main component of industrial solid waste, and is an extremely low-grade resource. As a big mining country, my country produces a large amount of fine-grained tailings waste every year. According to incomplete statistics, more than 150 kinds of minerals have been discovered in my country, more than 8,000 mines have been developed, and 5.97 billion tons of fine-grained tailings waste have been produced accumulatively. A large amount of fine-grained tailings waste not only occupies land and causes waste of resources, but also causes serious pollution and harm to human living environment and ecological balance, and has received more and more attention. Because most of the fine-grained tailings w...

Claims

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Application Information

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IPC IPC(8): C04B28/04
Inventor 汪潇虞雷平邬健明倪志才黄浩张国怀
Owner JIANGSU NATURE WAY TECH
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